221431044240 has 120 divisors (see below), whose sum is σ = 849873455808. Its totient is φ = 50612808960.

The previous prime is 221431044239. The next prime is 221431044293. The reversal of 221431044240 is 42440134122.

221431044240 is a `hidden beast` number, since 2 + 214 + 3 + 1 + 0 + 442 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21962326 + ... + 21972405.

Almost surely, 2^221431044240 is an apocalyptic number.

221431044240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221431044240 is an abundant number, since it is smaller than the sum of its proper divisors (628442411568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221431044240 is a wasteful number, since it uses less digits than its factorization.

221431044240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43934757 (or 43934748 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 221431044240 its reverse (42440134122), we get a palindrome (263871178362).

The spelling of 221431044240 in words is "two hundred twenty-one billion, four hundred thirty-one million, forty-four thousand, two hundred forty".